Sash construction



Oct. 4, 1938. J. c. NEUENDORF SASH CONSTRUCTION Filed March 50, 1937 I Fin! INVENTOR.

MY? m5 6'? flfeaemawf BY ATTSEJI? Patented Oct. 4, 1938 UNITED STATESPATENT OFFICE SASH CONSTRUCTION Julius C. Neuendorf, Detroit, Mich.Application March so, 1937, Serial No. 133,799

2 Claims. (01. 20-565) This invention relates to sash construction andthe rib 2. A rubber channel 5 is fitted about the the object of theinvention is to provide a sash edge of each pane of glass 6 and thesepanes with which to all appearances is composed of divided the rubberchannels therein are positioned on lights but which actually consists ofclear sheets opposite sides of thecentral rib 2 and on the 5 of glassmounted in spaced relation in the sash shoulders 3 and 4. Slots 1 arecut into the sash and provided with dividing muntin bars between I toreceive the edges of the securing spring metal the glass panes to givethe appearance of divided strips 8 and these strips are turned outwardlylights. and are return bent to provide a spring flange 9 One of theparticular objects of the invention is which engages and presses theglass panes against 10 to provide a sash having two panes of glass thecentral rib 2. As the flanges 9 are of spring 10 mounted in spacedrelation and which may be metal, they firmly hold the panes in place andreadily washed over the entire surface without the compress the rubberchannel portions against the troublesome cleaning in the cornersnecessitated rib 2 and nails it may be driven through the sash in adivided sash while the sash, at the same time, and member 8 as shown inFig. 2 to secure the has the appearance of a divided sash without anyspring metal strips in place in their slots. The 15 of its drawbacks.spring metal strip construction is covered more Another object of theinvention is to produce a particularly in my co-pending application,Serial sash having the appearance of a divided sash but No. 109,848, forMetal sash strips, filed November which does not require the fitting ofsmall panes 9, 1936. If desired, however, putty may be used in of glassbetween the muntin hars. place of the spring metal strips ii to securethe 20 A further object of the invention is to provide a glass panes inplace in the sash. double glazed window consisting of a pair of A seriesof muntin bars are positioned between glass panes sealed in rubber andpositioned the spaced glass panes 6. These muntin bars are againstopposite sides of assembled muntin bars different than the ordinarymuntin bars in that to provide a sash having air spaces for insulationthey are not provided with shoulders against 25 with the panes of glasssealed at the edges to the which the small panes of glass are usuallyfitted. sash. In fact, the muntin bars are merely imitation A furtherobject of the invention is to provide muntin bars and are not strictlymuntin bars in muntin bars which maybe assembled and enclosed the truesense of the word in that they support between the two panes of glass toproperly space no small glass panes. The cross section of one 80 andsupport the panes of glass within the edges of the muntin bars is shownin Fig. 6 and this and providing in combination with the panes of muntinbar H is provided with fiat surfaces I2 glass, a unitary structurehaving a series of and I4 against which the glass panes 6 may rest.small dead air pockets. The muntin bars are assembled by forming theThese objects and the several novel features of end of one muntin bar asshown in Fig. 5 with a 35 the invention are hereinafter more fullydescribed fiat groove 15 to receive the edge l6 of -the other andclaimed and the preferred form of construcmuntin bar and this groove i5is provided with tion by which these objects are attained is showncurved faces I! to fit the curved faces l8 of the in the accompanyingdrawing in whichother muntin bar. The muntin bar shown in 0 Fig. 1 is anelevation of a sash embodying my Fig. 5 is provided with extending endsl9 adapted invention. to fit into notches 20 provided in the ribs I2 andFig. 2 is an enlarged section taken on line 2-2 l4 of the other muntinbar as will be understood of Fig. 1. from Figs. 4, 5 and 6. These endsl9 extend only Fig. 3 is an elevation of the assembled muntin half waythrough the rib 12 as will be understood bars to be positioned betweenthe glass panes. from Figs. 3 and 4 and the muntin bars are as- 45 Fig.4 is an enlarged section taken on line 4-4 sembled by providing twolongitudinal bars ll of Fig. 3. and a series of transverse muntin bars2| which Fig. 5 is a view of one of the muntin bars. are formed with thenotched ends shown in Fig. 5.

Fig. 6 is a perspective view of the other muntin These muntin bars areassembled and glued tobar with which the muntin bar end shown in Fig.gether as shown in Figs. 3 and 4 and are then 50 5 is to be assembled.ready for installation in assembling the sash.

The sash is shown in section at the left of Fig. 2 One glass panel isfirst secured in position and and comprises a sash member i having aninthen the assembled muntin bar shown in Fig. 3 wardly extending rib 2between the sides and havis placed within the plane of the rib 2 whichexmg shoulders 3 and 4 formed on opposite sides of tends on the foursides of the sash and then the 55 other glass pane is assembled againstthe muntin bars. By this arrangement, the assembled muntin bars restagainst the ribs 2 of the sash members an the glass panels contact theribs I! and H of he muntin bars.

Thus, the assembled muntin bars space the glass panels apart and supportthe same and also divide the sash into a series of dead air pocketswhich provides insulation from heat ,and cold and is especially valuablefor use with air conditioned buildings.

One or the principal objections to divided sash which are so popular incolonial type houses is due to the iact that it is a tiresome andcareful job to wash the usual small panes of glass provided by thedivided sash. With my construction, however, two smooth large glasspanes are provided which may be verv easily washed in a small part ofthe time required to wash the usual divided sash glasses. Also, thissmooth surface is provided on both the exterior and the interior and itis only these surfaces that need to be washed. My construction alsoovercomes the expense and labor of glazing the large number 01' smalllights required in the usual divided sash of this nature. At the sametime, the appearance of the sash is that of a divided sash both from theinterior and the exterior of the building and the fact that the glasspanes are on the outside of the muntin bars cannot be detected exceptupon very close inspection. By this construction, the muntin barsstrengthen and support the glass panes and as the muntin bars act asreenforcements for both panes it will support the glass againstconsiderable pressure and forms a'rigid unit which will resist breakageby wind storms, tornadoes, etc. Also, the number or small dead airpockets formed by the muntin bars gives greater insulating value in thatthe air has no space in which to circulate and transfer heat or coldfrom one pane to the other. By removal of one pane, the muntin barsmaybe readily lifted out to allow cleaning of the insides oi the glasspanes should it ever become necessary.

While I have described the muntin bars as being made 01' wood, they mayalso be made 01 hollow metal, extruded metal or metal tubing of thedesired shape and of other materials practical for this use. In fact,any material may be used which may be enclosed between the glass panesand will have the appearance or muntin bars.

From the foregoing description it becomes evident that the device isvery simple and efllcient in operation, will have the appearance of adivided sash without its disadvantages, provides an air sealedinsulating sash and provides a device which accomplishes the objectsdescribed.

Having thus fully described my invention, its utility and mode ofoperation, what I claim and desire to secure by Letters Patent of theUnited States is- 1. In a sash construction, a rectangular sash havingan inwardly extending rib on each side, a pair of glass panes for thesash, a rubber channel extending about the edge oi each glass pane, theglass panes being positioned on opposite sides of the ribs with therubber channels engaging the ribs, a series of spring flanges secured toeach side of the sash and pressing the glass panes toward each other toprovide a sealed air space between the glass panes and a series ofmuntin bars assembled together and positioned between the glass panes,the muntin bars dividing the sealed air space between the glass panesinto a series of air pockets.

2. In a-sash construction, a rectangular sash having an inwardlyextending rib on each side, a pair of glass panes for the sash, a gasketextending about the edge of each glass pane, the glass panes beingpositioned on opposite sides of the ribs with the gaskets engaging theribs, a series of spring flanges secured to each side of each sash andpressing the glass panes toward each other to provide a sealed air spacebetween the glass panes and a series of muntin bars assembled togetherand positioned between the glass panes, the muntin bars dividing thesealed air space between the glass panes into a series 01' air pockets.

JULIUS C. NEUENDORF.

